Persons using assistive technology might not be able to fully access information in this file. For assistance, please send e-mail to: mmwrq@cdc.gov. Type 508 Accommodation in the subject line of e-mail.

Abstract

Problem/Condition: Certain modifiable maternal behaviors and experiences before, during, and after pregnancy
are associated with adverse health outcomes for the mother and her infant (e.g., physical abuse, insufficient folic
acid consumption, smoking during pregnancy, and improper infant sleep position). Information about these
behaviors and experiences is needed to monitor trends in maternal and infant health, enhance understanding of the
relation between maternal behaviors and infant health outcomes, plan and evaluate maternal and infant health
programs, direct policy decisions, and monitor progress toward achieving the national
Healthy People 2010 [HP 2010] objectives
(US Department of Health and Human Services. Healthy people 2010. 2nd ed. With understanding
and improving health and objectives for improving health [2 vols.]. Washington, DC: US Department of Health and
Human Services; 2000).

Reporting Period Covered: 2000--2003.

Description of System: The Pregnancy Risk Assessment Monitoring System (PRAMS) is an ongoing, state-
and population-based surveillance system designed to monitor selected maternal behaviors and experiences that
occur before, during, and after pregnancy among women who deliver live-born infants. PRAMS employs a mixed
mode data-collection methodology; up to three
self-administered surveys are mailed to a sample of
mothers; nonresponders are followed up with telephone interviews. Self-reported survey data are linked to selected
birth certificate data and weighted for sample design, nonresponse, and noncoverage to create annual PRAMS
analysis data sets that can be used to produce statewide estimates of perinatal health behaviors and experiences
among women delivering live infants. This report summarizes data for 2000--2003 from 19 states (Alabama,
Alaska, Arkansas, Colorado, Florida, Hawaii, Illinois, Louisiana, Maine, Nebraska, New Mexico, New York,
North Carolina, Ohio, Oklahoma, South Carolina, Utah, Washington, and West Virginia) that measured progress
toward achieving HP 2010 objectives for eight perinatal indicators: 1) pregnancy intention, 2) multivitamin use, 3)
physical abuse, 4) cigarette smoking during pregnancy, 5) cigarette smoking cessation, 6) drinking alcohol during
pregnancy, 7) breastfeeding initiation, and 8) infant sleep position.

Results: In 2003, prevalence of intended pregnancy among women having a live birth ranged from 48.1%
in Louisiana to 66.5% in Maine; during 2000--2003, no state experienced a statistically significant
(p<0.05) increase in prevalence of intended pregnancy, and one state experienced a significant decrease. In 2003, prevalence
of multivitamin use at least four times per week during the month before pregnancy ranged from 23.0% in Arkansas
to 45.2% in Maine; during 2000--2003, multivitamin use increased significantly in three states (Illinois,
North Carolina, and Utah). In 2003, prevalence of physical abuse by a husband or partner during the 12 months
before pregnancy ranged from 2.2% in Maine to 7.6% in New Mexico; during 2000--2003, significant decreases
were recorded in three states (Alaska, Hawaii, and Nebraska). In 2003, prevalence of abstinence from cigarette
smoking during the last 3 months of pregnancy ranged from 72.5% in West Virginia to 96.1% in Utah; during
2000--2003, a significant increase was recorded in Utah. In 2003, prevalence of smoking cessation during pregnancy
ranged
from 30.2% in West Virginia to 65.8% in Utah; during 2000--2003, a significant increase was recorded in Utah.
In 2003, prevalence of abstinence from alcohol during the last 3 months of pregnancy ranged from 91.3% in
Colorado to 98.0% in Utah; during 2000--2003, abstinence increased significantly in Louisiana and Utah
but decreased significantly in Florida and Nebraska. In 2003, prevalence of mothers who breastfed their babies in
the early postpartum period ranged from 51.2% in Louisiana to 90.3% in Alaska; during 2000--2003,
significant increases were recorded in six states (Arkansas, Illinois, Louisiana, Nebraska, North Carolina, and South
Carolina). In 2003, prevalence of healthy full-term infants who were placed to sleep on their backs ranged from 50.0%
in Arkansas to 78.7% in Washington; during 2000--2003, significant increases were recorded in eight states
(Alaska, Colorado, Illinois, Louisiana, Maine, Nebraska, North Carolina, and West Virginia). In 2003, all
19 states achieved or exceeded the HP 2010 objective for smoking cessation during pregnancy, and 16 states achieved the HP
2010 objective for abstinence from alcohol during the last 3 months of pregnancy. In addition, nearly half of the
states achieved the objectives for breastfeeding in the early postpartum period and infant back sleep position. However,
no state achieved the HP 2010 objectives for intended pregnancy, multivitamin use before pregnancy, absence
of physical abuse before pregnancy, or abstinence from smoking during pregnancy.

Interpretation: PRAMS data indicate variability among states regarding progress toward achieving HP
2010 objectives in the area of maternal and child health. More progress has been made in achieving objectives
focused on the period during and after pregnancy (e.g., smoking cessation and proper infant sleep position); less progress has been
made in achieving objectives related to behaviors and experiences in the preconception period (e.g., pregnancy intention
and multivitamin use).

Public Health Action: State maternal and child health programs can use these state- and population-based data
to monitor progress toward achieving HP 2010 objectives, identify indicators to target for intervention, and plan
and evaluate programs that promote positive maternal and infant health behaviors, experiences, and outcomes.
These data also can be used to guide policy decisions that could affect the health of mothers and infants.

Introduction

Healthy People 2010 (HP 2010) serves as the national comprehensive guide for disease prevention and health promotion
(1). The objectives outlined in HP 2010 cover a broad spectrum of health topics and aim to increase the quality and years of
healthy life and to eliminate health
disparitiesamong persons living in the United States.
With respect to maternal, infant, and child health, the overall goal
is to improve the health and well-being of women, infants,
children, and families. This report focuses on perinatal indicators associated with the following eight
HP 2010 objectives regarding behaviors and experiences
before, during, and after pregnancy: 1) pregnancy intention, 2) multivitamin use, 3) physical abuse, 4) cigarette smoking during pregnancy,
5) cigarette smoking cessation, 6) drinking alcohol during pregnancy, 7) breastfeeding initiation, and 8) infant sleep position
(Table 1).

In the preconception period, multiple factors (e.g., pregnancy intention, folic acid consumption, and physical abuse)
affect maternal and infant health status during and after pregnancy. Women who experience an unintended pregnancy
resulting in a live birth are more likely than those with an intended pregnancy to delay entry into prenatal care, have poor
maternal nutrition, use alcohol during pregnancy, and have adverse maternal and infant outcomes
(2). Folic acid consumption before pregnancy reduces the incidence of neural tube defects (NTDs)
(3). NTDs affect an estimated 3,000 pregnancies
annually, and 95% of children born with an NTD are born to couples with no history of these birth defects
(4,5). Folic acid intake of >400
µg daily can reduce the incidence of NTDs by 50%
(6). The U.S. Public Health Service recommends that all women
of childbearing age who are capable of becoming pregnant should consume 400
µg of folic acid daily through either supplementation or fortified foods
(6). Physical abuse before pregnancy is associated with late entry into prenatal care,
especially among older women of higher socioeconomic status
(7). Abuse also is related to an increased risk for low birthweight and
to increased mortality and morbidity for mothers and infants
(8). Physical abuse before pregnancy often is a strong predictor
of physical abuse during pregnancy (9,10).

Certain maternal behaviors and experiences during pregnancy (e.g., cigarette smoking and alcohol consumption) also
affect maternal and infant health outcomes. Smoking during pregnancy contributes to multiple complications in pregnancy
and
poor infant health outcomes, including placenta previa, abruptio placentae, preterm birth, low birthweight, and sudden
infant death syndrome (SIDS) (11--13). After delivery, maternal smoking continues to affect the health of the infant negatively,
and environmental tobacco smoke exposure among children is associated with an increased risk for respiratory tract
infections (e.g., bronchitis and pneumonia, otitis media, and childhood asthma)
(14). The two causes of infant death most
strongly associated with maternal smoking are respiratory
infections and SIDS (13--15). Smoking cessation, especially early
in pregnancy, has been determined to improve poor infant
health outcomes associated with smoking during pregnancy
(16--19). Drinking alcohol during pregnancy is
associated with multiple birth defects, including fetal alcohol syndrome,
mental retardation, neurodevelopment disorders, and increased spontaneous abortions
(20,21). Because no threshold of alcohol consumption during pregnancy is recognized as safe, and because research indicating that susceptibility to adverse effects
from prenatal alcohol exposure varies among children, the American Academy of Pediatrics (AAP), the American College
of Obstetricians and Gynecologists, and the U.S. Surgeon General recommend that pregnant women abstain from
alcohol consumption (22,23).

Certain postpartum maternal behaviors (e.g., breastfeeding and positioning of an infant during sleep) also can affect
infant health. Breastfeeding, the preferred method of infant feeding recommended by AAP, is associated with multiple health
benefits, including reduced risk for infectious illnesses, reduced
incidence of coughing or wheezing, reduced risk for
ear infections (among those infants without older siblings), and improved immunity, growth, and cognitive function for the infant
(24--27). In addition, breastfeeding is associated with less postpartum bleeding and a reduced risk
for ovarian and premenopausal breast cancer for the mother
(24,28). Infant sleep position has been recognized as a major modifiable risk factor for SIDS, a
leading cause of infant mortality (29--31). To reduce the risk
for SIDS, AAP recommends that infants be placed to sleep in the
supine position (i.e., on their backs) (31).

Methods

Project Description

The Pregnancy Risk Assessment Monitoring System (PRAMS) is an ongoing, state- and population-based
surveillance system designed to monitor selected self-reported
maternal behaviors and experiences that occur before, during, and
after pregnancy among women who deliver live-born infants. PRAMS is administered by CDC in collaboration with state
health departments. The project supports the activities of CDC's Safe Motherhood Initiative, which aims to reduce infant
mortality and low infant birthweight. PRAMS data can be used in planning and evaluating programs, directing policy decisions,
and monitoring progress toward achieving national health objectives.

PRAMS was developed to monitor low birthweight and preterm birth and to understand the relation between
maternal behaviors and these outcomes, including maternal and child health and vital statistics. Since its inception in 1987,
the program has expanded from six sites to 39 participating health departments (38 states and New York City) (Figure 1).
This represents approximately 75% of all live births in the United States. An additional eight states (Delaware,
Massachusetts, Missouri, Pennsylvania, Tennessee, Virginia, Wisconsin, and
Wyoming)and one tribal area (South Dakota) were funded
in 2006 to begin data collection in 2007.

The PRAMS questionnaire collects information on multiple maternal behaviors and experiences. This report uses
PRAMS data to assess the status during 2000--2003 of 19 states (Alabama, Alaska, Arkansas, Colorado, Florida, Hawaii,
Illinois, Louisiana, Maine, Nebraska, New Mexico, New York, North Carolina, Ohio, Oklahoma, South Carolina, Utah,
Washington, and West Virginia) with respect to achieving eight HP 2010 objectives related to maternal and child health
(Table 1). State trends during 2000--2003 were analyzed to monitor progress toward achieving these objectives. The
results from this analysis can assist states in setting priorities for policy and program planning related to making progress toward achieving the eight
HP 2010 objectives.

Data Collection

Consistent with previous and ongoing PRAMS procedure, all participating health departments use a standardized
data collection method developed by CDC. In each reporting area, a monthly stratified sample of 100--300 new mothers
is selected from birth certificates. PRAMS employs a
mixed-mode data collection methodology in which a
self-
administered survey is mailed to mothers in the sample, typically 2--3 months after delivery to permit collection
of information about postpartum maternal and infant experiences. Mothers who do not complete the first survey are mailed
a second; if they do not complete the second survey, they are mailed a third. Mothers who do not complete any of the three
mail surveys are contacted by telephone, for a total data collection period of 95 days. To minimize recall bias, efforts to
contact women end 9 months postpartum. Self-reported survey data are linked to selected birth certificate data and weighted
for sample design, nonresponse, and noncoverage. The PRAMS questionnaire is revised periodically to reflect changing
priorities and emerging issues. Each revision is referred
to as a phase, and all new questions are tested thoroughly through
cognitive interviewing and written feedback before full-scale implementation. All data highlighted in this report were collected with
the Phase Four version of the questionnaire, which was implemented with the 2000 birth
cohort and continued through the 2003 cohort. Additional details regarding the PRAMS methodology have been published previously
(32).

Data Analysis

This report includes results from 19 states that collected data during 2000--2003 and achieved weighted response rates
of >70% in 1 year. To prevent nonresponse bias, a threshold of 70% was determined by an internal working group
to ensure reasonable representativeness of the population of
interest. Those states that did not achieve this threshold
were excluded from the analysis. The weighted response rate indicates the proportion of women sampled who completed a
survey, adjusted for sample design.

Data are presented for eight self-reported maternal behaviors and experiences (Table 1). New York data exclude New
York City, which has its own vital records agency separate from the state's. The 2003 prevalence estimates are presented by
state together with the corresponding HP 2010 objective
(Table 2). Trend data for 2000--2003 are presented by state for
each indicator.

All tables in this report were produced using weighted PRAMS data. Percentages were calculated for the characteristic
using SUDAAN (33). An estimate is noted when the percentage of missing values is
>10%. In tables with trend data, the p
value indicates a test for linear trend and was calculated using SUDAAN
(33).

Results

Intended Pregnancy

The HP 2010 objective for this indicator (objective no.
9-1) is that 70% of all pregnancies will be intended. In 2003,
state prevalence of intended pregnancy among women delivering a live-born infant ranged from 48.1% in Louisiana to 66.5%
in Maine (Table 2). Although no state achieved the objective for intended pregnancy, four were within 10% of doing so.
Trend analysis indicated that prevalence of intended
pregnancy declined significantly in Nebraska during 2000--2003; among
the other states, prevalence of intended pregnancy remained relatively unchanged (Table 3).

Multivitamin Use

The HP 2010 objective for this indicator (objective
no. 16-16a) is that 80% of nonpregnant women aged 15--44 years
will consume >400 µg of folic acid daily. Multivitamin use at least four times per week has been demonstrated to provide
the recommended amount of folic acid (34). In 2003, state prevalence of multivitamin use at least four times per week during
the month before pregnancy ranged from 23.0% in Arkansas
to 45.2% in Maine, much lower than the 80% goal for the
objective (Table 2). In three states (Illinois, North
Carolina, and Utah), prevalence of multivitamin use
increased significantly during 2000--2003 (Table 4); for the other states, trend analysis indicated that prevalence of multivitamin use before
pregnancy remained relatively unchanged.

Physical Abuse

The HP 2010 objective for this indicator (objective no.
15-34) is to reduce to 0.33% the rate of physical assault on
persons aged >12 years by a current or former intimate partner. In 2003, prevalence of physical abuse by a husband or partner
during
the 12 months before pregnancy ranged from 2.2% in Maine to 7.6% in New Mexico (Table 2). During
2000--2003, prevalence of physical abuse by a husband or partner during the 12 months before pregnancy decreased significantly in
three states (Alaska, Hawaii, and Maine) (Table 5); for the other states, trend analysis indicated that prevalence of physical
abuse during the 12 months before pregnancy remained
relatively unchanged.

Abstinence from Smoking During Pregnancy

The HP 2010 objective for this indicator (objective no.
16-17c) is that 99% of pregnant women will abstain from
cigarette smoking. Because PRAMS does not collect data on tobacco use during the first or second trimester of pregnancy, for
this analysis, abstinence from smoking during pregnancy was defined as abstinence from smoking during the last
3 months of pregnancy. In 2003, prevalence of abstinence from cigarette smoking during the last 3 months of pregnancy ranged
from 72.5% in West Virginia to 96.1% in Utah (Table 2). No state achieved the objective for abstinence from smoking
during pregnancy. During 2000--2003, prevalence of
abstinence from cigarette smoking during pregnancy
increased significantly only in Utah (Table 6); for the other states, prevalence of abstinence from smoking during the last
3 months of pregnancy remained relatively unchanged.

Smoking Cessation During Pregnancy

The HP 2010 objective for this indicator (objective no.
27-6) is that 30% of smokers will stop smoking during
pregnancy. For this analysis, smoking cessation was defined as the report of any cigarette smoking during the 3 months before
pregnancy but no cigarette smoking reported during the last
3 months of pregnancy. In 2003, prevalence of smoking cessation
during pregnancy ranged from 30.2% in West Virginia to 65.8% in Utah (Table 2). All states achieved the health objective
for smoking cessation. During 2000--2003, prevalence of smoking cessation during pregnancy increased
significantly (Table 7) in Utah; for the other states, trend analysis indicated that prevalence of smoking cessation remained relatively unchanged.

Abstinence from Alcohol Use During Pregnancy

The HP 2010 objective for this indicator (objective no.
16-17a) is that 94% of all women will abstain from drinking
alcohol during pregnancy. Because PRAMS does not collect data on alcohol use during the first or second trimester of pregnancy,
for this analysis, abstinence from alcohol use during pregnancy was defined as abstinence from drinking alcohol during the last
3 months of pregnancy. In 2003, prevalence of abstinence from alcohol during the last 3 months of pregnancy ranged
from 91.3% in Colorado to 98.0% in Utah (Table 2). Sixteen states achieved the objective for this indicator. During
2000--2003, prevalence of abstinence from alcohol during the last 3 months of pregnancy increased significantly in two states
(Louisiana and Utah) and decreased significantly in two states (Florida and Nebraska) (Table 8); for the other states, prevalence
of abstinence from alcohol during pregnancy remained relatively unchanged.

Breastfeeding in the Early Postpartum Period

The HP 2010 objective for this indicator (objective no.
16-19a) is that 75% of women with an infant will
initiate breastfeeding in the early postpartum period. For this analysis, breastfeeding in the early postpartum period was defined as
the report of having ever breastfed after delivery. In 2003, prevalence of mothers who breastfed their babies in the
early postpartum period ranged from 51.2% in Louisiana to 90.3% in Alaska
(Table 2). Eight states (Alaska, Colorado, Hawaii, Maine, Nebraska, New Mexico, Utah, and Washington) achieved the objective for this indicator. During
2000--2003, prevalence of mothers who breastfeed their babies in the early postpartum period increased significantly in six states
(Arkansas, Illinois, Louisiana, Nebraska, North Carolina, and South Carolina) (Table 9); for the other states, trend analysis indicated
that no change occurred in prevalence of breastfeeding in the early postpartum period.

Infant Sleep Position

The HP 2010 objective for this indicator (objective no.
16-13) is that 70% of all healthy full-term infants are placed to
sleep on their backs. In 2003, prevalence of healthy full-term infants who were placed to sleep on their backs ranged from 50.0%
in
Arkansas to 78.7% in Washington (Table 2). Seven states (Alaska, Colorado, Maine, Nebraska, New York, Utah,
and Washington) have achieved the objective for infant sleep position. During 2000--2003, prevalence of mothers who
placed their healthy full-term infants to sleep on their backs a majority of the time increased significantly in eight states
(Alaska, Colorado, Illinois, Louisiana, Maine, Nebraska, North Carolina and West Virginia) (Table 10); for the other states,
trend analysis indicated that prevalence of infants who were placed to sleep on their backs a majority of the time remained
relatively unchanged.

Summary

No state achieved the HP 2010 objectives for three indicators in the preconception period that affect maternal and
child health outcomes (intended pregnancy, multivitamin use during the month before pregnancy, and physical abuse during the
12 months before pregnancy). For behaviors in the prenatal period, results were mixed. No state achieved the objective
for abstinence from smoking during pregnancy. However, all states included in this analysis achieved the objective for
smoking cessation during pregnancy, and more than three fourths have achieved or exceeded the objective for abstinence from
alcohol during pregnancy. Nearly half of the states in this analysis achieved the objective for breastfeeding in the early
postpartum period, and slightly more than one third achieved the objective for infant sleep position (Figure 2).

Discussion

The 19 states included in this report have made progress in achieving certain maternal and child health HP 2010
objectives. However, increased efforts are needed for states to achieve all eight HP 2010 objectives examined in this
report. More progress has been made in the health indicators related to maternal behaviors during pregnancy (e.g., smoking cessation and
abstinence from tobacco and alcohol) and after pregnancy (e.g., breastfeeding in the early postpartum period and infant sleep
position) than for those related to behaviors before pregnancy (e.g., pregnancy intention and multivitamin use)
(Figure 2). The preconception period is an important area of focus for future maternal and child health efforts. Recent recommendations
for the preconception period include changing consumer knowledge about the
importance of preconception health behaviors and services, improving clinical practice, developing and improving public health programs, improving health-care financing,
and using data and research to identify new strategies for improvement and to monitor progress
(35).

Although PRAMS data are useful for assessing progress
toward achieving the HP 2010 objectives, they cannot be used
to determine causal agents or explain why certain intervention programs were more successful than others. Few published
studies evaluate state level interventions specific to these objectives and offer concrete examples of ways to improve health
outcomes. However, certain initiatives have proven successful in improving indicators discussed in this report. For
example, effective interventions have been developed to encourage breastfeeding and placing infants to sleep on their backs.

The Baby-Friendly Hospital Initiative, launched by the World Health Organization and the United Nations
Children's Emergency Fund, improves breastfeeding rates in hospitals through a 10-step program to encourage successful
breastfeeding. These steps include having a written breastfeeding policy, training staff in the skills needed to implement the policy,
informing new mothers about the benefits of breastfeeding, helping new mothers initiate breastfeeding,
allowing mothers and infants to remain together 24 hours a day, and fostering the development of support for breastfeeding after mothers leave the hospital
(36). In one study, the Baby-Friendly Hospital Initiative
improved breastfeeding initiation rates absolutely during a four-year
period, from 58% to 86.5% (37).

In 1992, AAP recommended that all healthy infants be placed to sleep on their backs to reduce the risk for SIDS
(38). National and federal agencies joined together to launch the Back to Sleep campaign to educate parents and infant care
givers about the importance of infants sleeping on their backs
(39). An evaluation of that campaign, using PRAMS data for
1996--1998 from 15 states, determined that a significant
reduction had occurred in prevalence of prone infant sleeping
(40). As of 2003, seven PRAMS states had achieved the HP 2010 objective for infant sleep position. During 2000--2003, four
other states made significant progress toward achieving the goal; seven states made no progress. Additional educational efforts
might help the remaining states achieve the HP 2010
objective.

Limitations

The findings in this report are subject to at least five limitations. First, PRAMS data are not generalizable to other states,
the entire United States, or all pregnant women, only those who delivered live-born infants. Second, because PRAMS
reports only on unintended pregnancies resulting in a live birth, prevalence of unintended pregnancies is probably underestimated.
Third, because PRAMS does not collect data on alcohol or tobacco use during the first or second trimesters of pregnancy,
estimates do not capture prevalence of women who used alcohol or tobacco in early pregnancy. Fourth, smoking estimates are based
on self-reported data, which likely underestimated the true rate of smoking
(41). Finally, the indicator for folic acid
consumption, multivitamin use, does not capture women's consumption for folic acid precisely, and PRAMS data therefore might
not accurately reflect prevalence of women achieving this objective.

Conclusions

PRAMS was established to provide state-level data on women's health before, during, and shortly after pregnancy to
assist health agencies and researchers to monitor trends in maternal and infant health indicators. This report provides a snapshot
of how PRAMS data can be used to monitor state progress toward achieving maternal and child HP 2010 objectives.
Continued use of PRAMS data to monitor these maternal behaviors is important for implementing, evaluating, and setting priorities
for future initiatives at the state level. PRAMS data can be used to gain support for specific programs and initiatives aimed
at improving the health of women and infants
(42). In April 2006, PRAMS added nine additional sites; the total number of
sites collecting PRAMS data is 39 (38 states and New York City), representing approximately
75% of all U.S. live births. This expansion brings PRAMS closer
to the goal of a nationwide maternal and child health surveillance system and provides
the opportunity for more states to monitor progress toward achieving HP 2010
objectives.

References

US Department of Health and Human Services. Healthy people 2010. 2nd ed. With understanding and improving health and objectives
for improving health (2 vols.). Washington, DC: US Department of Health and Human Services; 2000.

Use of trade names and commercial sources is for identification only and does not imply endorsement by the U.S. Department of
Health and Human Services.References to non-CDC sites on the Internet are
provided as a service to MMWR readers and do not constitute or imply
endorsement of these organizations or their programs by CDC or the U.S.
Department of Health and Human Services. CDC is not responsible for the content
of pages found at these sites. URL addresses listed in MMWR were current as of
the date of publication.

DisclaimerAll MMWR HTML versions of articles are electronic conversions from ASCII text
into HTML. This conversion may have resulted in character translation or format errors in the HTML version.
Users should not rely on this HTML document, but are referred to the electronic PDF version and/or
the original MMWR paper copy for the official text, figures, and tables.
An original paper copy of this issue can be obtained from the Superintendent of Documents,
U.S. Government Printing Office (GPO), Washington, DC 20402-9371; telephone: (202) 512-1800.
Contact GPO for current prices.

**Questions or messages regarding errors in formatting should be addressed to
mmwrq@cdc.gov.